openplans/OpenTripPlanner — Issue #553: floating island errors in graph due to bus stops on depedestrianized roads
Author: PJHouser
Created: 2011-10-26 20:01:00+00:00
State: open
Labels: routing, webapp

When a street is only connected to the network by way of a trunk road, its nodes show up on that list. So, after OTP "depedestrianizes" them, it's making them unwalkable even though you could get there via bus/bicycle. For instance, say there's a bus stop on the trunk road by a residential road. OTP should still allow people to get off the bus there (and snap to the residential road if necessary).

Trunks & motorways are usually CAR only, and sometimes BICYCLE&CAR, and very rarely ALL. But buses still go along trunk roads that are CAR access, and have bus stops.

In this example, I actually asked it to start on NE Argyle Street, but because MLK is a trunk road without pedestrian access, making NE Argyle a floating island, the start point is snapped to a few blocks away.
http://rtp.trimet.org/?submit&fromPlace=45.584605399451,-122.66215577137&toPlace=45.581324031105,-122.66340031635&mode=TRANSIT,WALK&min=QUICK&maxWalkDistance=840&time=12:57%20pm&date=10/26/2011&arr=Depart&itinID=1